﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WinformText0001
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            var sql = "select * from Articles";

            var dt = DbHelper.GetDataTable(sql);

            dataGridView1.DataSource = dt;
            dataGridView1.ReadOnly = true;
            dataGridView1.AllowUserToAddRows = false;
            dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
        }
        /// <summary>
        /// 查找
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            var name = textBox1.Text;
            var sql = string.Format("select * from Articles where Title like '%{0}%'",name);

            var dt = DbHelper.GetDataTable(sql);

            dataGridView1.DataSource = dt;
        }
        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            EditForm editform = new EditForm();
            var res = editform.ShowDialog();

            if (res == DialogResult.Yes)
            {
                var name = textBox1.Text;
                var sql= string.Format("select * from Articles where Title like '%{0}%'", name);
                var dt = DbHelper.GetDataTable(sql);

                dataGridView1.DataSource = dt;
            }
            else
            {
                MessageBox.Show("你取消了操作");
            }
        }
        /// <summary>
        /// 更新
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            if (dataGridView1.SelectedRows.Count > 0)
            {
                var id = (int)dataGridView1.SelectedRows[0].Cells["Id"].Value;
              
                var author = (string)dataGridView1.SelectedRows[0].Cells["Author"].Value;

                var title = (string)dataGridView1.SelectedRows[0].Cells["Title"].Value;



                EditForm editform = new EditForm(id, author,title);
                var res = editform.ShowDialog();

                if (res == DialogResult.Yes)
                {
                    var names= textBox1.Text;
                    var sql= string.Format("select * from Articles where Title like '%{0}%'", names);
                    var dt = DbHelper.GetDataTable(sql);

                    dataGridView1.DataSource = dt;
                }
                else
                {
                    MessageBox.Show("你取消了操作");
                }


            }
            else
            {
                MessageBox.Show("您未选择任何的数据行", "提示");
            }

        }
        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            if (dataGridView1.SelectedRows.Count > 0)
            {
                var row = dataGridView1.SelectedRows[0];

                var id = (int)row.Cells["Id"].Value;

                var res = MessageBox.Show("确定删除吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information);


                if (res.Equals(DialogResult.Yes))
                {
                    var sql = string.Format("delete from Articles where Id={0}", id);
                    var rowCount = DbHelper.AddOrUpDateOrDelete(sql);
                    if (rowCount > 0)
                    {
                        var name = textBox1.Text;
                        var sqlStu = string.Format("select * from Articles where Title like '%{0}%'", name);
                        var dt = DbHelper.GetDataTable(sqlStu);

                        dataGridView1.DataSource = dt;


                        MessageBox.Show("删除成功", "提示");
                    }
                }
            }
            else
            {
                MessageBox.Show("没有选择任何的行", "提示");
            }



        }
    }
}
    
